/**
 * login
 */
function doLogin() {
	var area = document.getElementById('errMsg');
	var err = '';
	var account = document.getElementById('account').value;
	var password = document.getElementById('password').value;
	var verifyCode = document.getElementById('verifyCode').value;
	if('' == account) {
		err += '用户名不能为空 <br />';
	}
	if('' == password) {
		err += '密码不能为空 <br />';
	}
	if('' == verifyCode) {
		err += '验证码不能为空 <br />';
	}
	
	if('' == err) {
		window.f1.submit();
	} else {
		area.innerHTML = err;
	}
}